151
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Song LC, Tan H, Luo FX, Wang YX, Ma Z, Niu Z. Synthesis, Structural Characterization, and Catalytic H2 Production of Ferrocenyl (Fc) Group Containing Complexes [Ni(PFc2NAr2)2](BF4)2 (Ar = Ph, p-BrC6H4). Organometallics 2014. [DOI: 10.1021/om500571n] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Cheng Song
- Department of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 94
Weijin Road, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China
| | - Hao Tan
- Department of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 94
Weijin Road, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China
| | - Fei-Xian Luo
- Department of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 94
Weijin Road, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China
| | - Yong-Xiang Wang
- Department of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 94
Weijin Road, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China
| | - Zhen Ma
- Department of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 94
Weijin Road, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China
| | - Zheng Niu
- Department of Chemistry,
State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 94
Weijin Road, Tianjin 300071, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China
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152
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Newman GL, Rahman JMA, Gluyas JBG, Yufit DS, Howard JAK, Low PJ. Alkynyl-Phosphine Substituted Fe2S2 Clusters: Synthesis, Structure and Spectroelectrochemical Characterization of a Cluster with a Class III Mixed-Valence [FeFe]3+ Core. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0790-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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153
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Bernal OI, Mooney CB, Flickinger MC. Specific photosynthetic rate enhancement by cyanobacteria coated onto paper enables engineering of highly reactive cellular biocomposite “leaves”. Biotechnol Bioeng 2014; 111:1993-2008. [DOI: 10.1002/bit.25280] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/22/2014] [Accepted: 04/28/2014] [Indexed: 01/01/2023]
Affiliation(s)
- Oscar I. Bernal
- Department of Chemical and Biomolecular Engineering; North Carolina State University; 911 Partners Way Raleigh North Carolina 27695
| | - Charles B. Mooney
- Analytical Instrumentation Facility; North Carolina State University; Raleigh North Carolina
| | - Michael C. Flickinger
- Department of Chemical and Biomolecular Engineering; North Carolina State University; 911 Partners Way Raleigh North Carolina 27695
- Golden-LEAF Biomanufacturing Training and Education Center; North Carolina State University; Raleigh North Carolina
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154
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155
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Fredin LA, Pápai M, Rozsályi E, Vankó G, Wärnmark K, Sundström V, Persson P. Exceptional Excited-State Lifetime of an Iron(II)-N-Heterocyclic Carbene Complex Explained. J Phys Chem Lett 2014; 5:2066-71. [PMID: 26270494 DOI: 10.1021/jz500829w] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Earth-abundant transition-metal complexes are desirable for sensitizers in dye-sensitized solar cells or photocatalysts. Iron is an obvious choice, but the energy level structure of its typical polypyridyl complexes, featuring low-lying metal-centered states, has made such complexes useless as energy converters. Recently, we synthesized a novel iron-N-heterocyclic carbene complex exhibiting a remarkable 100-fold increase of the lifetime compared to previously known iron(II) complexes. Here, we rationalize the measured excited-state dynamics with DFT and TD-DFT calculations. The calculations show that the exceptionally long excited-state lifetime (∼9 ps) is achieved for this Fe complex through a significant destabilization of both triplet and quintet metal-centered scavenger states compared to other Fe(II) complexes. In addition, a shallow (3)MLCT potential energy surface with a low-energy transition path from the (3)MLCT to (3)MC and facile crossing from the (3)MC state to the ground state are identified as key features for the excited-state deactivation.
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Affiliation(s)
| | - Mátyás Pápai
- ‡Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary
| | - Emese Rozsályi
- ‡Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary
| | - György Vankó
- ‡Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary
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156
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Fukatsu A, Kondo M, Okamura M, Yoshida M, Masaoka S. Electrochemical response of metal complexes in homogeneous solution under photoirradiation. Sci Rep 2014; 4:5327. [PMID: 24937471 PMCID: PMC4060467 DOI: 10.1038/srep05327] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 05/29/2014] [Indexed: 11/26/2022] Open
Abstract
The electrochemical detection of metal complexes in the photoexcited state is important for understanding photoinduced electron transfer (PET) processes, which play a central role in photo-energy conversion systems. In general, however, the redox potentials of excited states have been indirectly estimated by a combination of spectroscopic properties and ground-state redox potentials. To establish a simple method for directly determining the redox potentials of the photoexcited states of metal complexes, electrochemical measurements under several conditions were performed. The electrochemical response was largely influenced not only by the generation of photoexcited molecules but also by the convection induced by photoirradiation, even when the global temperature of the sample solution was unchanged. The suppression of these unfavourable electrochemical responses was successfully achieved by adopting well-established electrochemical techniques. Furthermore, as an initial demonstration, the photoexcited state of a Ru-based metal complex was directly detected, and its redox potential was determined using a thin layer electrochemical method.
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Affiliation(s)
- Arisa Fukatsu
- 1] Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1, Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan [2] The Graduate University for Advanced Studies [SOKENDAI], Shonan Village, Hayama, Kanagawa 240-0193 Japan
| | - Mio Kondo
- 1] Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1, Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan [2] The Graduate University for Advanced Studies [SOKENDAI], Shonan Village, Hayama, Kanagawa 240-0193 Japan [3] Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38, Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585 Japan [4] ACT-C, Japan Science and Technology Agency (JST), 4-1-8, Honcho, Kawaguchi, Saitama 332-0012 Japan
| | - Masaya Okamura
- 1] Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1, Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan [2] The Graduate University for Advanced Studies [SOKENDAI], Shonan Village, Hayama, Kanagawa 240-0193 Japan
| | - Masaki Yoshida
- Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1, Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan
| | - Shigeyuki Masaoka
- 1] Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science, 5-1, Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 Japan [2] The Graduate University for Advanced Studies [SOKENDAI], Shonan Village, Hayama, Kanagawa 240-0193 Japan [3] Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38, Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585 Japan
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157
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Li ZJ, Fan XB, Li XB, Li JX, Ye C, Wang JJ, Yu S, Li CB, Gao YJ, Meng QY, Tung CH, Wu LZ. Visible light catalysis-assisted assembly of Ni(h)-QD hollow nanospheres in situ via hydrogen bubbles. J Am Chem Soc 2014; 136:8261-8. [PMID: 24835886 DOI: 10.1021/ja5047236] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hollow spheres are one of the most promising micro-/nanostructures because of their unique performance in diverse applications. Templates, surfactants, and structure-directing agents are often used to control the sizes and morphologies of hollow spheres. In this Article, we describe a simple method based on visible light catalysis for preparing hollow nanospheres from CdE (E = Te, Se, and S) quantum dots (QDs) and nickel (Ni(2+)) salts in aqueous media. In contrast to the well-developed traditional approaches, the hollow nanospheres of QDs are formed in situ by the photogeneration of hydrogen (H2) gas bubbles at room temperature. Each component, that is, the QDs, metal ions, ascorbic acid (H2A), and visible light, is essential for the formation of hollow nanospheres. The quality of the hollow nanospheres depends on the pH, metal ions, and wavelength and intensity of visible light used. Of the various metal ions investigated, including Cu(+), Cu(2+), Fe(2+), Fe(3+), Ni(2+), Mn(2+), RuCl5(2-), Ag(+), and PtCl4(2-), Ni(2+) ions showed the best ability to generate H2 and hollow-structured nanospheres under visible light irradiation. The average diameter and shell thickness of the nanospheres ranged from 10 to 20 nm and from 3 to 6 nm, respectively, which are values rarely reported in the literature. Studies using high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), inductively coupled plasma-mass spectroscopy (ICP-AES), and steady-state and time-resolved spectroscopy revealed the chemical nature of the hollow nanospheres. Additionally, the hollow-structured nanospheres exhibit excellent photocatalytic activity and stability for the generation of H2 with a rate constant of 21 μmol h(-1) mg(-1) and a turnover number (TON) of 137,500 or 30,250 for CdTe QDs or nickel, respectively, under visible light irradiation for 42 h.
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Affiliation(s)
- Zhi-Jun Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
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158
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Dyar SM, Barnes JC, Juríček M, Stoddart JF, Co DT, Young RM, Wasielewski MR. Electron Transfer and Multi-Electron Accumulation in ExBox4+. Angew Chem Int Ed Engl 2014; 53:5371-5. [DOI: 10.1002/anie.201402444] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Indexed: 12/17/2022]
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159
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Klingan K, Ringleb F, Zaharieva I, Heidkamp J, Chernev P, Gonzalez-Flores D, Risch M, Fischer A, Dau H. Water oxidation by amorphous cobalt-based oxides: volume activity and proton transfer to electrolyte bases. CHEMSUSCHEM 2014; 7:1301-1310. [PMID: 24449514 DOI: 10.1002/cssc.201301019] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 11/11/2013] [Indexed: 06/03/2023]
Abstract
Water oxidation in the neutral pH regime catalyzed by amorphous transition-metal oxides is of high interest in energy science. Crucial determinants of electrocatalytic activity were investigated for a cobalt-based oxide film electrodeposited at various thicknesses on inert electrodes. For water oxidation at low current densities, the turnover frequency (TOF) per cobalt ion of the bulk material stayed fully constant for variation of the thickness of the oxide film by a factor of 100 (from about 15 nm to 1.5 μm). Thickness variation changed neither the nanostructure of the outer film surface nor the atomic structure of the oxide catalyst significantly. These findings imply catalytic activity of the bulk hydrated oxide material. Nonclassical dependence on pH was observed. For buffered electrolytes with pKa values of the buffer base ranging from 4.7 (acetate) to 10.3 (hydrogen carbonate), the catalytic activity reflected the protonation state of the buffer base in the electrolyte solution directly and not the intrinsic catalytic properties of the oxide itself. It is proposed that catalysis of water oxidation occurs within the bulk hydrated oxide film at the margins of cobalt oxide fragments of molecular dimensions. At high current densities, the availability of a proton-accepting base at the catalyst-electrolyte interface controls the rate of water oxidation. The reported findings may be of general relevance for water oxidation catalyzed at moderate pH by amorphous transition-metal oxides.
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Affiliation(s)
- Katharina Klingan
- FB Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin (Germany)
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160
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Dyar SM, Barnes JC, Juríček M, Stoddart JF, Co DT, Young RM, Wasielewski MR. Electron Transfer and Multi-Electron Accumulation in ExBox4+. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402444] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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161
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Jackson NE, Heitzer HM, Savoie BM, Reuter MG, Marks TJ, Ratner MA. Emergent Properties in Locally Ordered Molecular Materials. Isr J Chem 2014. [DOI: 10.1002/ijch.201400021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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162
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Baxter JB, Richter C, Schmuttenmaer CA. Ultrafast Carrier Dynamics in Nanostructures for Solar Fuels. Annu Rev Phys Chem 2014; 65:423-47. [DOI: 10.1146/annurev-physchem-040513-103742] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Sunlight can be used to drive chemical reactions to produce fuels that store energy in chemical bonds. These fuels, such as hydrogen from splitting water, have much larger energy density than do electrical storage devices. The efficient conversion of clean, sustainable solar energy using photoelectrochemical and photocatalytic systems requires precise control over the thermodynamics, kinetics, and structural aspects of materials and molecules. Generation, thermalization, trapping, interfacial transfer, and recombination of photoexcited charge carriers often occur on femtosecond to picosecond timescales. These short timescales limit the transport of photoexcited carriers to nanometer-scale distances, but nanostructures with high surface-to-volume ratios can enable both significant light absorption and high quantum efficiency. This review highlights the importance of understanding ultrafast carrier dynamics for the generation of solar fuels, including case studies on colloidal nanostructures, nanostructured photoelectrodes, and photoelectrodes sensitized with molecular chromophores and catalysts.
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Affiliation(s)
- Jason B. Baxter
- Drexel University, Department of Chemical and Biological Engineering, Philadelphia, Pennsylvania 19104
| | - Christiaan Richter
- Rochester Institute of Technology, Department of Chemical Engineering, Rochester, New York 14623
| | - Charles A. Schmuttenmaer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516-7394
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163
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Hu K, Robson KCD, Beauvilliers EE, Schott E, Zarate X, Arratia-Perez R, Berlinguette CP, Meyer GJ. Intramolecular and Lateral Intermolecular Hole Transfer at the Sensitized TiO2 Interface. J Am Chem Soc 2014; 136:1034-46. [DOI: 10.1021/ja410647c] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Ke Hu
- Departments
of Chemistry and Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Kiyoshi C. D. Robson
- Department
of Chemistry and Center for Advanced Solar Materials, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N-1N4
| | - Evan E. Beauvilliers
- Departments
of Chemistry and Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Eduardo Schott
- Laboratorio
de Bionanotecnología, Universidad Bernardo O’Higgins, General Gana 1780, Santiago, Chile
| | - Ximena Zarate
- Laboratorio
de Bionanotecnología, Universidad Bernardo O’Higgins, General Gana 1780, Santiago, Chile
| | - Ramiro Arratia-Perez
- Departamento
de Ciencias Químicas, Relativistic Molecular Physics Group, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - Curtis P. Berlinguette
- Department
of Chemistry and Center for Advanced Solar Materials, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N-1N4
| | - Gerald J. Meyer
- Departments
of Chemistry and Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
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164
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Frey CE, Wiechen M, Kurz P. Water-oxidation catalysis by synthetic manganese oxides – systematic variations of the calcium birnessite theme. Dalton Trans 2014; 43:4370-9. [DOI: 10.1039/c3dt52604f] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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165
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Angeles-Boza AM, Ertem MZ, Sarma R, Ibañez CH, Maji S, Llobet A, Cramer CJ, Roth JP. Competitive oxygen-18 kinetic isotope effects expose O–O bond formation in water oxidation catalysis by monomeric and dimeric ruthenium complexes. Chem Sci 2014. [DOI: 10.1039/c3sc51919h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Competitive 18O KIEs on water oxidation catalysis provide a probe of transition states for O–O bond formation.
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Affiliation(s)
| | - Mehmed Z. Ertem
- Department of Chemistry and Supercomputing Center
- University of Minnesota
- Minneapolis, USA
| | - Rupam Sarma
- Department of Chemistry
- Johns Hopkins University
- Baltimore, USA
| | | | - Somnath Maji
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona, Spain
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona, Spain
| | - Christopher J. Cramer
- Department of Chemistry and Supercomputing Center
- University of Minnesota
- Minneapolis, USA
| | - Justine P. Roth
- Department of Chemistry
- Johns Hopkins University
- Baltimore, USA
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166
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Wang HY, Liu J, Zhu J, Styring S, Ott S, Thapper A. A Ru–Co hybrid material based on a molecular photosensitizer and a heterogeneous catalyst for light-driven water oxidation. Phys Chem Chem Phys 2014; 16:3661-9. [DOI: 10.1039/c3cp54500h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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167
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Ghosh D, Saha U, Mukherjea KK. A light harvesting mononuclear manganese(ii) complex: synthesis, characterization, DFT and TDDFT calculations and photophysical profile. RSC Adv 2014. [DOI: 10.1039/c4ra00729h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new manganese(ii) [MnII(DEMP)(NCS)(H2O)] (DEMP = Schiff base derived from salicylaldehyde and 2-diethylaminoethylamine) complex has been synthesized and characterized. The complex absorbs light ranging from 200–850 nm. Thus, the molecule is capable of harvesting the entire range of sunlight falling on earth.
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Affiliation(s)
- Debalina Ghosh
- Department of Chemistry
- Jadavpur University
- Calcutta (Kolkata), India
| | - Urmila Saha
- Department of Chemistry
- Jadavpur University
- Calcutta (Kolkata), India
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168
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Wang W, Yu T, Zeng Y, Chen J, Yang G, Li Y. Enhanced photocatalytic hydrogen production from an MCM-41-immobilized photosensitizer–[Fe–Fe] hydrogenase mimic dyad. Photochem Photobiol Sci 2014; 13:1590-7. [DOI: 10.1039/c3pp50446h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A covalently linked photosensitizer–[Fe–Fe] hydrogenase mimic dyad is stabilized by immobilizing it into MCM-41, giving an enhanced catalytic efficiency for hydrogen production.
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Affiliation(s)
- Wen Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
| | - Tianjun Yu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
| | - Yi Zeng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
| | - Jinping Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
| | - Guoqiang Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
| | - Yi Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
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169
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Photobiological hydrogen production: Bioenergetics and challenges for its practical application. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2013. [DOI: 10.1016/j.jphotochemrev.2013.05.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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170
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El-Khouly ME, Fukuzumi S, D'Souza F. Photosynthetic Antenna-Reaction Center Mimicry by Using Boron Dipyrromethene Sensitizers. Chemphyschem 2013; 15:30-47. [DOI: 10.1002/cphc.201300715] [Citation(s) in RCA: 203] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Indexed: 12/12/2022]
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171
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Young RM, Dyar SM, Barnes JC, Juríček M, Stoddart JF, Co DT, Wasielewski MR. Ultrafast Conformational Dynamics of Electron Transfer in ExBox4+⊂Perylene. J Phys Chem A 2013; 117:12438-48. [DOI: 10.1021/jp409883a] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ryan M. Young
- Department of Chemistry and ‡Argonne-Northwestern Solar Energy
Research
(ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Scott M. Dyar
- Department of Chemistry and ‡Argonne-Northwestern Solar Energy
Research
(ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Jonathan C. Barnes
- Department of Chemistry and ‡Argonne-Northwestern Solar Energy
Research
(ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Michal Juríček
- Department of Chemistry and ‡Argonne-Northwestern Solar Energy
Research
(ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - J. Fraser Stoddart
- Department of Chemistry and ‡Argonne-Northwestern Solar Energy
Research
(ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Dick T. Co
- Department of Chemistry and ‡Argonne-Northwestern Solar Energy
Research
(ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Michael R. Wasielewski
- Department of Chemistry and ‡Argonne-Northwestern Solar Energy
Research
(ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
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172
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Jian JX, Liu Q, Li ZJ, Wang F, Li XB, Li CB, Liu B, Meng QY, Chen B, Feng K, Tung CH, Wu LZ. Chitosan confinement enhances hydrogen photogeneration from a mimic of the diiron subsite of [FeFe]-hydrogenase. Nat Commun 2013; 4:2695. [DOI: 10.1038/ncomms3695] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 10/01/2013] [Indexed: 01/01/2023] Open
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173
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Mejía E, Luo SP, Karnahl M, Friedrich A, Tschierlei S, Surkus AE, Junge H, Gladiali S, Lochbrunner S, Beller M. A Noble-Metal-Free System for Photocatalytic Hydrogen Production from Water. Chemistry 2013; 19:15972-8. [DOI: 10.1002/chem.201302091] [Citation(s) in RCA: 136] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Indexed: 11/11/2022]
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174
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Song W, Ito A, Binstead RA, Hanson K, Luo H, Brennaman MK, Concepcion JJ, Meyer TJ. Accumulation of multiple oxidative equivalents at a single site by cross-surface electron transfer on TiO2. J Am Chem Soc 2013; 135:11587-94. [PMID: 23848562 DOI: 10.1021/ja4032538] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The photodriven accumulation of two oxidative equivalents at a single site was investigated on TiO2 coloaded with a ruthenium polypyridyl chromophore [Ru(bpy)2((4,4'-(OH)2PO)2bpy)](2+) (Ru(II)P(2+), bpy = 2,2'-bipyridine, ((OH)2PO)2-bpy = 2,2'-bipyridine-4,4'-diyldiphosphonic acid) and a water oxidation catalyst [Ru(Mebimpy) ((4,4'-(OH)2PO-CH2)2bpy)(OH2)](2+) (Ru(II)OH2(2+), Mebimpy = 2,6-bis(1-methylbenzimidazol-2-yl)pyridine, (4,4'-(OH)2PO-CH2)2bpy) = 4,4'-bis-methlylenephosphonato-2,2'-bipyridine). Electron injection from the metal-to-ligand charge transfer (MLCT) excited state of -Ru(II)P(2+) (-Ru(II)P(2+)*) to give -Ru(III)P(3+) and TiO2(e(-)) was followed by rapid (<20 ns) nearest-neighbor -Ru(II)OH2(2+) to -Ru(III)P(3+) electron transfer. On surfaces containing both -Ru(II)P(2+) and -Ru(III)OH2(3+) (or -Ru(III)OH(2+)), -Ru(II)OH2(2+) was formed by random migration of the injected electron inside the TiO2 nanoparticle and recombination with the preoxidized catalyst, followed by relatively slow (μs-ms) non-nearest neighbor cross-surface electron transfer from -Ru(II)OH2(2+) to -Ru(III)P(3+). Steady state illumination of coloaded TiO2 photoanodes in a dye sensitized photoelectrosynthesis cell (DSPEC) configuration resulted in the buildup of -Ru(III)P(3+), -Ru(III)OH(2+), and -Ru(IV)═O(2+), with -Ru(IV)═O(2+) formation favored at high chromophore to catalyst ratios.
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Affiliation(s)
- Wenjing Song
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA
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175
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Hong D, Mandal S, Yamada Y, Lee YM, Nam W, Llobet A, Fukuzumi S. Water Oxidation Catalysis with Nonheme Iron Complexes under Acidic and Basic Conditions: Homogeneous or Heterogeneous? Inorg Chem 2013; 52:9522-31. [DOI: 10.1021/ic401180r] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Dachao Hong
- Department of Material
and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science Technology Agency (JST),
Suita, Osaka 565-0871, Japan
| | - Sukanta Mandal
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Yusuke Yamada
- Department of Material
and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science Technology Agency (JST),
Suita, Osaka 565-0871, Japan
| | - Yong-Min Lee
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Wonwoo Nam
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Antoni Llobet
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
- Institute of Chemical Research of Catalonia (ICIQ),
Avinguda Països Catalans 16, E-43007 Tarragona, Spain
| | - Shunichi Fukuzumi
- Department of Material
and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science Technology Agency (JST),
Suita, Osaka 565-0871, Japan
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
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176
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Abstract
Proton-coupled electron transfer (PCET) plays a crucial role in many enzymatic reactions and is relevant for a variety of processes including water oxidation, nitrogen fixation, and carbon dioxide reduction. Much of the research on PCET has focused on transfers between molecules in their electronic ground states, but increasingly researchers are investigating PCET between photoexcited reactants. This Account describes recent studies of excited-state PCET with d(6) metal complexes emphasizing work performed in my laboratory. Upon photoexcitation, some complexes release an electron and a proton to benzoquinone reaction partners. Others act as combined electron-proton acceptors in the presence of phenols. As a result, we can investigate photoinduced PCET involving electron and proton transfer in a given direction, a process that resembles hydrogen-atom transfer (HAT). In other studies, the photoexcited metal complexes merely serve as electron donors or electron acceptors because the proton donating and accepting sites are located on other parts of the molecular PCET ensemble. We and others have used this multisite design to explore so-called bidirectional PCET which occurs in many enzymes. A central question in all of these studies is whether concerted proton-electron transfer (CPET) can compete kinetically with sequential electron and proton transfer steps. Short laser pulses can trigger excited-state PCET, making it possible to investigate rapid reactions. Luminescence spectroscopy is a convenient tool for monitoring PCET, but unambiguous identification of reaction products can require a combination of luminescence spectroscopy and transient absorption spectroscopy. Nevertheless, in some cases, distinguishing between PCET photoproducts and reaction products formed by simple photoinduced electron transfer (ET) (reactions that don't include proton transfer) is tricky. Some of the studies presented here deal directly with this important problem. In one case study we employed a cyclometalated iridium(III) complex. Our other studies with ruthenium(II) complexes and phenols focused on systematic variations of the reaction free energies for the CPET, ET, and proton transfer (PT) steps to explore their influence on the overall PCET reaction. Still other work with rhenium(I) complexes concentrated on the question of how the electronic structure of the metal-to-ligand charge transfer (MLCT) excited states affects PCET. We used covalent rhenium(I)-phenol dyads to explore the influence of the electron donor-electron acceptor distance on bidirectional PCET. In covalent triarylamine-Ru(bpy)₃²⁺/Os(bpy)₃²⁺-anthraquinone triads (bpy = 2,2'-bipyridine), hydrogen-bond donating solvents significantly lengthened the lifetimes of photogenerated electron/hole pairs because of hydrogen-bonding to the quinone radical anion. Until now, comparatively few researchers have investigated this variation of PCET: the strengthening of H-bonds upon photoreduction.
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Affiliation(s)
- Oliver S. Wenger
- Departement Chemie, Universität Basel, Spitalstrasse 51, CH-4056 Basel, Switzerland
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177
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Shi WJ, El-Khouly ME, Ohkubo K, Fukuzumi S, Ng DKP. Photosynthetic Antenna-Reaction Center Mimicry with a Covalently Linked Monostyryl Boron-Dipyrromethene-Aza-Boron-Dipyrromethene-C60Triad. Chemistry 2013; 19:11332-41. [DOI: 10.1002/chem.201300318] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 04/29/2013] [Indexed: 11/11/2022]
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178
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Goy R, Apfel UP, Elleouet C, Escudero D, Elstner M, Görls H, Talarmin J, Schollhammer P, González L, Weigand W. A Silicon-Heteroaromatic System as Photosensitizer for Light-Driven Hydrogen Production by Hydrogenase Mimics. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300537] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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179
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Fukuzumi S, Suenobu T. Hydrogen storage and evolution catalysed by metal hydride complexes. Dalton Trans 2013; 42:18-28. [PMID: 23080061 DOI: 10.1039/c2dt31823g] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The storage and evolution of hydrogen are catalysed by appropriate metal hydride complexes. Hydrogenation of carbon dioxide by hydrogen is catalysed by a [C,N] cyclometalated organoiridium complex, [Ir(III)(Cp*)(4-(1H-pyrazol-1-yl-κN(2))benzoic acid-κC(3))(OH(2))](2)SO(4) [Ir-OH(2)](2)SO(4), under atmospheric pressure of H(2) and CO(2) in weakly basic water (pH 7.5) at room temperature. The reverse reaction, i.e., hydrogen evolution from formate, is also catalysed by [Ir-OH(2)](+) in acidic water (pH 2.8) at room temperature. Thus, interconversion between hydrogen and formic acid in water at ambient temperature and pressure has been achieved by using [Ir-OH(2)](+) as an efficient catalyst in both directions depending on pH. The Ir complex [Ir-OH(2)](+) also catalyses regioselective hydrogenation of the oxidised form of β-nicotinamide adenine dinucleotide (NAD(+)) to produce the 1,4-reduced form (NADH) under atmospheric pressure of H(2) at room temperature in weakly basic water. In weakly acidic water, the complex [Ir-OH(2)](+) also catalyses the reverse reaction, i.e., hydrogen evolution from NADH to produce NAD(+) at room temperature. Thus, interconversion between NADH (and H(+)) and NAD(+) (and H(2)) has also been achieved by using [Ir-OH(2)](+) as an efficient catalyst and by changing pH. The iridium hydride complex formed by the reduction of [Ir-OH(2)](+) by H(2) and NADH is responsible for the hydrogen evolution. Photoirradiation (λ > 330 nm) of an aqueous solution of the Ir-hydride complex produced by the reduction of [Ir-OH(2)](+) with alcohols resulted in the quantitative conversion to a unique [C,C] cyclometalated Ir-hydride complex, which can catalyse hydrogen evolution from alcohols in a basic aqueous solution (pH 11.9). The catalytic mechanisms of the hydrogen storage and evolution are discussed by focusing on the reactivity of Ir-hydride complexes.
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Affiliation(s)
- Shunichi Fukuzumi
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan.
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180
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Yamada Y, Nomura A, Miyahigashi T, Ohkubo K, Fukuzumi S. Acetate Induced Enhancement of Photocatalytic Hydrogen Peroxide Production from Oxalic Acid and Dioxygen. J Phys Chem A 2013; 117:3751-60. [DOI: 10.1021/jp312795f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yusuke Yamada
- Department of Material and Life
Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871,
Japan
| | - Akifumi Nomura
- Department of Material and Life
Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871,
Japan
| | - Takamitsu Miyahigashi
- Department of Material and Life
Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871,
Japan
| | - Kei Ohkubo
- Department of Material and Life
Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871,
Japan
| | - Shunichi Fukuzumi
- Department of Material and Life
Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871,
Japan
- Department of Bioinspired
Science, Ewha Womans University, Seoul
120-750, Korea
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181
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Parada GA, Fredin LA, Santoni MP, Jäger M, Lomoth R, Hammarström L, Johansson O, Persson P, Ott S. Tuning the Electronics of Bis(tridentate)ruthenium(II) Complexes with Long-Lived Excited States: Modifications to the Ligand Skeleton beyond Classical Electron Donor or Electron Withdrawing Group Decorations. Inorg Chem 2013; 52:5128-37. [DOI: 10.1021/ic400009m] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Giovanny A. Parada
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Lisa A. Fredin
- Chemistry Department, Theoretical
Chemistry Division, Lund University, Box
124, SE-22100 Lund, Sweden
| | - Marie-Pierre Santoni
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Michael Jäger
- Laboratory of Organic and Macromolecular
Chemistry, Friedrich-Schiller-Universität Jena, Humboldtstr. 10, D-07743 Jena, Germany
| | - Reiner Lomoth
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Leif Hammarström
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Olof Johansson
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Petter Persson
- Chemistry Department, Theoretical
Chemistry Division, Lund University, Box
124, SE-22100 Lund, Sweden
| | - Sascha Ott
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
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182
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Coggins MK, Sun X, Kwak Y, Solomon EI, Rybak-Akimova E, Kovacs JA. Characterization of metastable intermediates formed in the reaction between a Mn(II) complex and dioxygen, including a crystallographic structure of a binuclear Mn(III)-peroxo species. J Am Chem Soc 2013; 135:5631-40. [PMID: 23470101 PMCID: PMC3709604 DOI: 10.1021/ja311166u] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Transition-metal peroxos have been implicated as key intermediates in a variety of critical biological processes involving O2. Because of their highly reactive nature, very few metal-peroxos have been characterized. The dioxygen chemistry of manganese remains largely unexplored despite the proposed involvement of a Mn-peroxo, either as a precursor to, or derived from, O2, in both photosynthetic H2O oxidation and DNA biosynthesis. These are arguably two of the most fundamental processes of life. Neither of these biological intermediates has been observed. Herein we describe the dioxygen chemistry of coordinatively unsaturated [Mn(II)(S(Me2)N4(6-Me-DPEN))] (+) (1), and the characterization of intermediates formed en route to a binuclear mono-oxo-bridged Mn(III) product {[Mn(III)(S(Me2)N4(6-Me-DPEN)]2(μ-O)}(2+) (2), the oxo atom of which is derived from (18)O2. At low-temperatures, a dioxygen intermediate, [Mn(S(Me2)N4(6-Me-DPEN))(O2)](+) (4), is observed (by stopped-flow) to rapidly and irreversibly form in this reaction (k1(-10 °C) = 3780 ± 180 M(-1) s(-1), ΔH1(++) = 26.4 ± 1.7 kJ mol(-1), ΔS1(++) = -75.6 ± 6.8 J mol(-1) K(-1)) and then convert more slowly (k2(-10 °C) = 417 ± 3.2 M(-1) s(-1), ΔH2(++) = 47.1 ± 1.4 kJ mol(-1), ΔS2(++) = -15.0 ± 5.7 J mol(-1) K(-1)) to a species 3 with isotopically sensitive stretches at νO-O(Δ(18)O) = 819(47) cm(-1), kO-O = 3.02 mdyn/Å, and νMn-O(Δ(18)O) = 611(25) cm(-1) consistent with a peroxo. Intermediate 3 releases approximately 0.5 equiv of H2O2 per Mn ion upon protonation, and the rate of conversion of 4 to 3 is dependent on [Mn(II)] concentration, consistent with a binuclear Mn(O2(2-)) Mn peroxo. This was verified by X-ray crystallography, where the peroxo of {[Mn(III)(S(Me2)N4(6-Me-DPEN)]2(trans-μ-1,2-O2)}(2+) (3) is shown to be bridging between two Mn(III) ions in an end-on trans-μ-1,2-fashion. This represents the first characterized example of a binuclear Mn(III)-peroxo, and a rare case in which more than one intermediate is observed en route to a binuclear μ-oxo-bridged product derived from O2. Vibrational and metrical parameters for binuclear Mn-peroxo 3 are compared with those of related binuclear Fe- and Cu-peroxo compounds.
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Affiliation(s)
- Michael K Coggins
- Department of Chemistry, University of Washington, Campus Box 351700 Seattle, Washington 98195-1700, USA
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183
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Yu T, Zeng Y, Chen J, Li YY, Yang G, Li Y. Exceptional dendrimer-based mimics of diiron hydrogenase for the photochemical production of hydrogen. Angew Chem Int Ed Engl 2013; 52:5631-5. [PMID: 23589161 DOI: 10.1002/anie.201301289] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Tianjun Yu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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184
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Increased photosystem II stability promotes H2 production in sulfur-deprived Chlamydomonas reinhardtii. Proc Natl Acad Sci U S A 2013; 110:7223-8. [PMID: 23589846 DOI: 10.1073/pnas.1220645110] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Photobiological H2 production is an attractive option for renewable solar fuels. Sulfur-deprived cells of Chlamydomonas reinhardtii have been shown to produce hydrogen with the highest efficiency among photobiological systems. We have investigated the photosynthetic reactions during sulfur deprivation and H2 production in the wild-type and state transition mutant 6 (Stm6) mutant of Chlamydomonas reinhardtii. The incubation period (130 h) was dissected into different phases, and changes in the amount and functional status of photosystem II (PSII) were investigated in vivo by electron paramagnetic resonance spectroscopy and variable fluorescence measurements. In the wild type it was found that the amount of PSII is decreased to 25% of the original level; the electron transport from PSII was completely blocked during the anaerobic phase preceding H2 formation. This block was released during the H2 production phase, indicating that the hydrogenase withdraws electrons from the plastoquinone pool. This partly removes the block in PSII electron transport, thereby permitting electron flow from water oxidation to hydrogenase. In the Stm6 mutant, which has higher respiration and H2 evolution than the wild type, PSII was analogously but much less affected. The addition of the PSII inhibitor 3-(3,4-dichlorophenyl)-1,1-dimethylurea revealed that ∼80% of the H2 production was inhibited in both strains. We conclude that (i) at least in the earlier stages, most of the electrons delivered to the hydrogenase originate from water oxidation by PSII, (ii) a faster onset of anaerobiosis preserves PSII from irreversible photoinhibition, and (iii) mutants with enhanced respiratory activity should be considered for better photobiological H2 production.
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185
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Yu T, Zeng Y, Chen J, Li YY, Yang G, Li Y. Exceptional Dendrimer-Based Mimics of Diiron Hydrogenase for the Photochemical Production of Hydrogen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301289] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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186
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Herzog W, Bronner C, Löffler S, He B, Kratzert D, Stalke D, Hauser A, Wenger OS. Electron Transfer between Hydrogen-Bonded Pyridylphenols and a Photoexcited Rhenium(I) Complex. Chemphyschem 2013; 14:1168-76. [DOI: 10.1002/cphc.201201069] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Indexed: 12/22/2022]
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187
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Lee SH, Kim JH, Park CB. Coupling Photocatalysis and Redox Biocatalysis Toward Biocatalyzed Artificial Photosynthesis. Chemistry 2013; 19:4392-406. [DOI: 10.1002/chem.201204385] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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188
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Karnahl M, Tschierlei S, Erdem ÖF, Pullen S, Santoni MP, Reijerse EJ, Lubitz W, Ott S. Mixed-valence [Fe(I)Fe(II)] hydrogenase active site model complexes stabilized by a bidentate carborane bis-phosphine ligand. Dalton Trans 2013; 41:12468-77. [PMID: 22955116 DOI: 10.1039/c2dt31192e] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of [FeFe]-hydrogenase active site analogues, with the general formula [Fe(2)(dt)(CO)(4)(BC)] 1-3 (dt = dithiolate, pdt = propyl-1,3-dt (1), bdt = benzene-1,2-dt (2), edt = ethyl-1,2-dt (3); BC = 1,2-bisdiphenylphosphine-1,2-o-carborane), has been prepared and structurally characterized. While the electrochemical reductions of 1-3 are largely invariant to the different nature of their dt bridges, the oxidations differ by more than 120 mV in between the series. Remarkably, all three compounds are reversibly oxidized, with complex 1 that contains the most electron-donating pdt ligand at the mildest potential of -0.09 V vs. Fc/Fc(+). The one-electron oxidized state 1(ox) is stable for several minutes and was spectroscopically characterized by FTIR and EPR. EPR spectroscopy provided evidence that in the mixed-valence [Fe(I)Fe(II)] state most of the spin density is located on the iron with the BC-ligand. This is monitored through the strong (31)P hyperfine coupling of the phenyl groups of the BC ligand, while further delocalization into the o-carborane unit is negligible.
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Affiliation(s)
- Michael Karnahl
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden.
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189
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Yu S, Wang F, Wang JJ, Wang HY, Chen B, Feng K, Tung CH, Wu LZ. Light-driven hydrogen evolution system with glutamic-acid-modified zinc porphyrin as photosensitizer and [FeFe]-hydrogenase model as catalyst. PURE APPL CHEM 2013. [DOI: 10.1351/pac-con-12-08-05] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An intermolecular light-driven hydrogen evolution system with free
glutamic-acid-modified zinc tetra(p-phenyl) porphyrin
(Glu-ZnP) as a photosensitizer and
[Fe2(CO)6(μ-adt)C6H5] [μ-adt =
N(CH2S)2] (Badt) as a catalyst has
been constructed. Using phenylmercaptan (BSH) as electron donor
and acetic acid (HOAc) as proton source, hydrogen was obtained after irradiation
with visible light for 2 h; the efficiency is comparable to that of the similar
intramolecular dyad. Steady-state and time-resolved spectroscopy and cyclic
voltammetry show that both the first and the second electron transfer from
singlet 1*Glu-ZnP to
Badt and reduced Badt are
thermodynamically feasible. However, the competition of electron transfer from
singlet 1*Glu-ZnP to Badt
with intersystem crossing from singlet
1*Glu-ZnP to triplet
3*Glu-ZnP, inefficient
electron transfer from triplet
3*Glu-ZnP to
Badt, and the lower energy of triplet
3*Glu-ZnP and possible
3*Badt to that of yielded
charge-separated state of
Glu-ZnP+·-Badt−· were
believed to be the obstacles for efficient hydrogen evolution.
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Affiliation(s)
- Shan Yu
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Feng Wang
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Jing-Jing Wang
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Hong-Yan Wang
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Bin Chen
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Ke Feng
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Chen-Ho Tung
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Li-Zhu Wu
- 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
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190
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Poddutoori PK, Zarrabi N, Moiseev AG, Gumbau-Brisa R, Vassiliev S, van der Est A. Long-Lived Charge Separation in Novel Axial Donor-Porphyrin-Acceptor Triads Based on Tetrathiafulvalene, Aluminum(III) Porphyrin and Naphthalenediimide. Chemistry 2013; 19:3148-61. [DOI: 10.1002/chem.201202995] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Indexed: 11/08/2022]
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191
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Flamigni L, Zanelli A, Langhals H, Böck B. Photoinduced processes in a dyad made of a linear and an angular perylene bisimide. Photochem Photobiol Sci 2013; 12:2137-45. [DOI: 10.1039/c3pp50211b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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192
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Hönes R, Kuss-Petermann M, Wenger OS. Photochemistry between a ruthenium(ii) pyridylimidazole complex and benzoquinone: simple electron transferversusproton-coupled electron transfer. Photochem Photobiol Sci 2013; 12:254-61. [DOI: 10.1039/c2pp25270h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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193
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He C, Wang J, Zhao L, Liu T, Zhang J, Duan C. A photoactive basket-like metal–organic tetragon worked as an enzymatic molecular flask for light driven H2production. Chem Commun (Camb) 2013; 49:627-9. [DOI: 10.1039/c2cc37853a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hvasanov D, Peterson JR, Thordarson P. Self-assembled light-driven photosynthetic-respiratory electron transport chain hybrid proton pump. Chem Sci 2013. [DOI: 10.1039/c3sc51780b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Healy AJ, Ash PA, Lenz O, Vincent KA. Attenuated total reflectance infrared spectroelectrochemistry at a carbon particle electrode; unmediated redox control of a [NiFe]-hydrogenase solution. Phys Chem Chem Phys 2013; 15:7055-9. [DOI: 10.1039/c3cp00119a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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NAGAI K, ABE T. Full-Spectrum-Visible-Light Photocatalyst Based on the Active Layer of Organic Solar Cell^|^mdash;Towards Water Splitting and Volatile Molecule Degradation^|^mdash;. KOBUNSHI RONBUNSHU 2013. [DOI: 10.1295/koron.70.459] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ko C, Solis BH, Soudackov AV, Hammes-Schiffer S. Photoinduced proton-coupled electron transfer of hydrogen-bonded p-nitrophenylphenol-methylamine complex in solution. J Phys Chem B 2012; 117:316-25. [PMID: 23237233 DOI: 10.1021/jp3107292] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Proton-coupled electron transfer can occur through concerted (electron-proton transfer, EPT) or sequential mechanisms, but this distinction becomes less well-defined for photoinduced reactions. These issues have been examined with transient absorption experiments on a hydrogen-bonded complex consisting of p-nitrophenylphenol and t-butylamine. These experiments revealed two spectroscopically distinct states: the higher-energy excited state was interpreted to be a conventional intramolecular charge transfer (ICT) state within the p-nitrophenylphenol, whereas the lower-energy state was interpreted to be an ICT-EPT state, where photoexcitation resulted in both ICT and the shifting of electronic density corresponding to effective proton transfer from the phenol to the amine. In the present work, the singlet excited states of the hydrogen-bonded p-nitrophenylphenol-methylamine complex in 1,2-dichloroethane are studied with time-dependent density functional theory and higher-level ab initio methods. The calculations suggest that the ππ* state, which is the S(1) state at the Franck-Condon geometry, corresponds to the state denoted ICT-EPT in the experimental analysis, whereas the nπ* state, which is the S(2) state at this geometry, likely corresponds to the state denoted ICT in the experimental analysis. According to the calculations, the ππ* state has charge-transfer character, as well as a change in electronic density on the amine, with the minimum-energy structure corresponding to the proton bonded to the nitrogen acceptor, consistent with proton transfer. The nπ* state has little charge-transfer character, as well as negligible change in electronic density on the amine, with the minimum-energy structure corresponding to the proton bonded to the oxygen donor. The calculations also provide evidence of an avoided crossing between these two states located energetically close to the Franck-Condon point. These calculations provide the foundation for future nonadiabatic molecular dynamics studies of the relaxation process.
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Affiliation(s)
- Chaehyuk Ko
- Department of Chemistry, 600 South Mathews Avenue, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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Joya KS, Vallés-Pardo JL, Joya YF, Eisenmayer T, Thomas B, Buda F, de Groot HJM. Molecular Catalytic Assemblies for Electrodriven Water Splitting. Chempluschem 2012. [DOI: 10.1002/cplu.201200161] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Wilker MB, Schnitzenbaumer KJ, Dukovic G. Recent Progress in Photocatalysis Mediated by Colloidal II-VI Nanocrystals. Isr J Chem 2012; 52:1002-1015. [PMID: 24115781 PMCID: PMC3791552 DOI: 10.1002/ijch.201200073] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 10/29/2012] [Indexed: 12/14/2022]
Abstract
The use of photoexcited electrons and holes in semiconductor nanocrystals as reduction and oxidation reagents is an intriguing way of harvesting photon energy to drive chemical reactions. This review focuses on recent research efforts to understand and control the photocatalytic processes mediated by colloidal II-VI nanocrystalline materials, such as cadmium and zinc chalcogenides. First, we highlight how nanocrystal properties govern the rates and efficiencies of charge-transfer processes relevant to photocatalysis. We then describe the use of nanocrystal catalyst heterostructures for fuel-forming reactions, most commonly H2 generation. Finally, we review the use of nanocrystal photocatalysis as a synthetic tool for metal-semiconductor nano-heterostructures.
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Affiliation(s)
- Molly B Wilker
- Department of Chemistry and Biochemistry, University of Colorado BoulderBoulder, CO 80309, USA
| | - Kyle J Schnitzenbaumer
- Department of Chemistry and Biochemistry, University of Colorado BoulderBoulder, CO 80309, USA
| | - Gordana Dukovic
- Department of Chemistry and Biochemistry, University of Colorado BoulderBoulder, CO 80309, USA
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